船用真空蒸馏式海水淡化装置的排盐泵一般多采用（）。
A.单螺杆泵
B.水环泵
C.水喷射泵
D.蒸汽喷射泵
参考答案：C
At the evening party the host said ______ was able to solve the riddle could get a nice present as a reward.
A．whoever
B．who
C．no matter who
D．whomever
某挡位出现跳挡，体验换挡操作时的手感是无阻力或阻力甚小，则为变速器（）失效。
A、自锁装置
B、互锁装置
C、倒挡锁装置
D、拨叉导槽磨损
